URL shorteners make Twitter a better platform in expressing an opinion, by linking to an external site. The most common trouble with the use of shortened URLs is the risk of reaching a phishing site instead of the original site. Phishing sites are designed to lure genuine users to log in to them using the original websites login credentials. Many fictitious billing sites will not incur damage to anyone if they are left alone, but if a user enters personal information without noticing the imaginary billing site, there is money to lose and money to earn for the scammers.”]
Source: https://hackercombat.com/url-shorteners-the-vehicle-of-malicious-links/